I broke the diff in my 12 bolt the first time with spray and 28's. haven't hurt it yet with the spool. Still gonna get a 9 inch though
if you watch this in high quality full screen you can see the puff of smoke when the n20 comes on right when I leave.
http://www.youtube.com/watch?v=9kWyY_kNQHw

 

there a few single discs that will handle the power. quick time is goin 9.90's with a 1.31 60 ft on a spec 3+. my mcloed single has lived for a long time and with 1.41 60 fts to prove. 28 et drags will work well but depending on gearing might be too much.

 

I only sprayed a few times but was leaving at about 4K or so on the gun. My tires are worn out so 60's were only 1.53 or so. 10 times of that and I twisted the driveshaft slip yoke.

 

I twisted my yoke too. Now I have a billet mark williams