I built one and raced it a few times, initial impression is very good.
The build is good w/the exception of the rear axle/hubs...mine had a wobble on the diff side. I just used an IRS rear axle/hubs and all is well. Hara and Moore use graphite axles too.
I didn't use the C12's front arms because they are not "lowered". I just used IRS arms w/ASE caster blocks and everything bolts up fine.
The car has a narrower front end than an L4, wheelbase is almost the same. The rear shock is one of the nicest features.....
P2,
You're not racing your OD12 anymore? BTW what's the turnout at Hobbytown SA like lately?