Milling PreCom plate PK50 3hole

Can anyone please send me some pics or give me some advise for milling the precom plate for use 25mm Malossi Kit reedvalve. What are the do and don't-s for removing the precom and preparing carter for max. use fuel/air

setup

Malossi 112cc

25mm carb. kit malossi reedvalve

parmakit 1kg ignition

worb crank reedvalve 43mm stroke

1 gear 55T DRT

3.00 reduction primaire