Well actually, Im going to write the second fight first, as Matty and Steve have their tactics in already.

Whirligig 4.0 vs. BIACS-LE

Whirligig 4.0 tore through Allanon and advanced with FBSDS.

BIACS-LE tore apart Panic Attack and allowed Enter the May Tracks to flip it OOTA.

Roboteers, stand by...

Booth 1: Whirligig 4.0
Booth 2: BIACS-LE

Its Double Whamlet and Obelix Bulguous who take the CPZs by storm.

3...
2...
1...
ACTIVATE!!

Whirligig is starting to spin his shell up but BIACS-LE is hurtling across the arena right at him! Whirligig turns tail immediately, but BIACS-LE is too quick and wallops his shell with the disc.
CRASH!!!
Whirligig goes flying across the arena, and BIACS-LE is only jolted back a few inches, and appears to be completely okay! Indeed the disc has absorbed the intense blow from the shell, and dished it back out! Whirligig isnt having the best of luck, as the shell took quite a bash there, and is slowly getting up to its high speed, but he doesnt have time to, as BIACS-LE without a second thought slams into him again disc-first!
CRASH!!!
Whirligig goes frisbee again, only slightly this time, and crashes into the arena wall, shell immobile, and part of the armour of the shell has been ripped up into the top of the FBS, rending it useless! Thats not good for Steve at all, but its about to get worse as BIACS-LE, having achieved his 4.7 seconds of spin-up time, approaches him again, and all this time the fibreglass shell hasnt suffered a single hit! Whirligig retreats away, being the faster of the two, and slams into the pit release button, and the pit goes down, down, down. BIACS-LE almost reaches him there but Whirligig again avoids conflict and goes away towards one of the arena saw hazards. WHATS THIS?! Whirligigs shell is starting to spin up to speed again! BIACS-LE continues to chase Whirligig down despite this, yet now the shell has reached maximum damage potential, and Whirligig is back in business. Before BIACS-LE can decide what to do now, Whirligig darts around and hammers his right side.
CRASH!!!
The fibreglass shatters upon impact, and pieces litter the floor as the titanium mesh crumples a bit, yet BIACS-LE hasnt been phased much by that hit, and responds by burying his own spinning weapon into Whirligig!
CRASH!!!
Whirligig is flipped into the air, and comes down heavily onto the arena floor, inverted, yet this time there is hardly any damage inflicted. Whirligig scurries away, yet not as quickly as before, possibly giving away the suspicious that something did happen, but the shell starts to reach dangerous speeds again. BIACS-LE spins up his own weapon but not quickly enough as Whirligig crashes into him.
CRASH!!!
BIACS-LE does the Tornado thing, spinning and spinning as Whirligig bounces a little, and spins up again. BIACS-LE comes to a halt, and suddenly Whirligig is out of control! Holy flying Mauler 5150 Batman! Whirligig is spinning almost like a coin, only a very thick and scary coin! BIACS-LE, knowing nothing better to do, races in and smacks Whirligigs underside quickly.
CRASH!!!
Whirligig is tossed again, only very far this time! He hits the wall and crashes down onto the floor as BIACS-LE continues his aggression. Whirligig gets away and BIACS-LE almost hits the wall, and Whirligigs shell is again attempting a spin-up. BIACS-LE isnt letting up and pursues Whirly once again. Whirligig is back at full speed and attacks BIACS-LE, dodging the disc and smashing into the left side!
CRASH!!!
Now the armours really taken a beating, as more of the fibreglass is destroyed, and the cage is looking rather sad, but again this has allowed BIACS-LE to attack Whirligig in return!
CRASH!!!
Whirligig soars, flying up, up, and down back onto the floor, righted, thus proving what 62kJ of energy can do. And hes right near the pit! BIACS-LE hurries forward looking to end the match but Whirligig gets away again...or does he? He went right into Obelixs CPZ, and now Obelix is making him pay for it! WHAM! Down comes the hammer and Whirligigs top armour takes a huge mashing! Whamlet heads over to Obelixs CPZ but BIACS-LE gets there first.
CRASH!!!
Whirligig flies up again, right onto Obelixs hammer arm, and the shell is looking miserable: great chunks have been ripped out and the blades are dented! Whamlet reaches the CPZ and shoves BIACS-LE out of the way, giving him a good thwack for good measure. Obelix brings the hammer down again and the arm sends Whirligig away from Obelix, and past Whamlet right to the edge of the pit, but Whirligig avoids death before BIACS-LE can take advantage.

10...9...8...7...

BIACS-LE shoots past Whamlet and right at Whirligig, who avoids the hit but cant spin up his shell.

6...5...4...

Whirligig heads over to the pit again but takes a hit from the arena saws causing some sparks, and BIACS-LE runs into them as well.

3...2...1...

Whirligig rolls around the pit as BIACS-LE comes behind in pursuit...

CEASE!

Fantastic battle! Judges, I dont envy you for a second.

Whirligig 4.0 - BIACS-LE

Style = 3/5 - 2/5
Control = 1/5 - 4/5
Damage = 2/5 - 3/5
Aggression = 1/5 - 4/5
Strategy = 1/5 - 4/5

Total = 8/25 - 17/25

Whirligig slides down the drain.
BIACS-LE advances to the Heat D Final!

Next battle: FBSDS vs. Enter the May Tracks (7)