Track Loose!

I have an '08 Nytro and just installed a 136" Hartman tunnel and rail extension kit. Could only find 8 tooth anti ratchet drivers(mine were 9) so I threw it in. Now my track is pretty loose at the after adjustment and it'll only get looser! The adjuster is at the end. Any suggestions? Would a bigwheel kit eat up some of the slack? Should I stick with 3 idlers on the rear axel or go to a 2 wheel kit? Any help would be great, thanks!

Ya, so, I went back to 9-tooth drivers. Not a lot of help on this one...