i've just pulled the trigger on an XPE (hard to resist for £106 - £54 off list price). I already have the DYN 053 pipe and the 086 as well as 9901 nova. Which pipe do you think will work best and how does this engine like to be tuned (bottom first with a rich top or a lean top and rich bottom)

Also as regards shimming for 30% - i read the alpha review but it sort of confused me

http://www.rcproproducts.com/Alpha_Testing_Page.html

What would you guys recommend (i run OD 97T plugs in all my motors) as the correct shimming.