I am doing the same Matthew. Have one completed and another two on the way. For what ever reason the first one was heavier than the one it was based on. Hopefully the other two perform a lot better.
My season 2 chassis is 10kg heavier than my one from season 1 - are the other stats likely to be worse as well? If so I may start developing another... (new chassis was based on the season 1 chassis)
Depends when you finished it James. If you have the available designers, then my theory is it doesn't hurt to try for another chassis, as you have time right now before the start of next season to get it finished.
Depends also on the weight, was your season 1 chassis light or heavy? My chassis weight it coming in after production at about 430kgs on average.
Nope, all Season 2 parts will work on any Season 2 chassis.
I can't say for certain if there is a penalty or not for it not being the same chassis that they were designed for, but I haven't noticed any penalty (either this season or in the Beta).