I think in this case a duowitch is a better option to activate the solenoids. Then you can activate 1 solenoid on forward push, and one solenoid on reverse.

Technobots has a Electronize multiswitch but I feel that thing is a pretty big for what it must do, Robbe has a RC switch that is a lot smaller and wil do the job as well.

http://at.robbe-online.net/rims_at.storefront/EN/product/1-8445http://at.robbe-online.net/rims_at.s...product/1-8445

This can switch 24V at 5A but Ive also switched Burkerts on 36V with them without any problems. There are 2 pots at the back where you can set the moment of switching, so you can have as much or as litte space between forward and reverse as you want (usually you want as much dead band as possible so no accidental forward reverse switching). There is also a memory funtion, but generally we turn that off (just remove 1 jumper on the board).

1 of the relays connect to 1 block, the other relay to the next.

(Message edited by leorcc on September 10, 2007)