Slightly off topic, I did run a 998 in the dyno that was balanced by chris and it was SMOOTH, well done c.
I have had the sps to try things with and the conclusion is that the stock parts are very good, if someone asked for recommendations it would be:
modified heads by someone who actually understands what it's about, good pistons (construction, fitment, comp), camtiming and a serious tune. No fancy bits required.
A perfectly good example is the 916 that chris did the heads for and I took care of cam timing and tuning, a few notes here
916 CJS-racing headwork, refining stock parts. Compared to a stock 916 with slipons its a bit better
http://www.hypertrick.net/reports/gr...S_vs_Stock.jpg
Both bikes fully warm and heat sinked, so no tempering with the graphs.