No real progress made i'd just like to share my latest cock up, so after taking the body off the bot yesterday to loctite the threads i was interrupted by my son waking up crying ( he's 18 months) and failed to notice that i had left the HDPE body by a radiator which subsequently came on quite hot, so this morning i go to fit the body back to the robot and find that it is now warped and no longer fits properly, and as i don't have enough material or enough money to make a new shell i have had to make the most of it and bodge a fix which has resulted in an ill fitting rear panel and a bowed side panel. So lesson learned i believe.