Glad it helps
Yeah same here...... Think there is only us 2 that own or own up to having the CORE
I'm currently running a 10.5 bl system in mine, Only raced mine once outdoors (at Bury) where i think I won most of the heats (till rain stopped play) cannot remember what gearing I had it on then

as it was put away untill this week where I got it running again for a play at my local indoor (smallish) track! I ran a 19t pinion (think it was the kit one) but think I need to go down a tooth or 2 as the motor was a little warm in practice!
Raced it in my last race against 3 Rats and finished 2nd, came off the rostrum with a huge grin they are such a giggle and I'm surprised at how well they grip with the standard tyres
Mine has been hopped up slightly..... I have losi shocks fitted, different motor plate, rear weight hanger thing (what the rear shock tower mounts to) turnbuckles (from a sc10) and alloy rear pivot blocks fitted!
I also have a savox low profile servo fitted and about 70/80g's of weight in the space behind the servo
I need to get to some more race meetings with it