Hi Doug,
No problem is no big secret. At first I had made the ridepads on the bottom 21mm.
The cat ran nice, as you see on the vid, but lost to much speed in the corners.
So I changed the ridepads width and angle, they are now 36mm and have an angle of 5 degrees.
This caused the cat to corner much better and gain a lot of top speed. Only thing is now , if you corner to tight and at high speed it will drift.
I would recommend that Harold makes them +/-35-36mm and give them an angle of 5-7degrees.
Depends on what engine used, standard PUM 5 degrees, tuned PUM 7 degrees.
My next build will have 7 degrees.
I have a build topic of my Cat on [link=http://www.xtremercboats.com/phpBB/viewtopic.php?t=13069]XtremeRCBoats.com[/link] it's a dutch site but there are pics in it that will give a lot of info.
Also a topic of the small version Cat I recently finished for my son, this has more pics and is a building manual for the small version [link=http://www.xtremercboats.com/phpBB/viewtopic.php?t=15151]MaxCatV2-S[/link], almost all is the same as the big Cat.
Marcel