procat read drum differential problem

[Drewwiley]

im building a stock procat from new parts and three donor cars.

firstly in the manual it recomends the use of silicon grease ms 1 or equiv. wouly tamiya molybdenum grease be ok.

page 4 of the manual shows using friction paper between a220 and t118. my donor car does not have this configuration. my steel washer has a hexagonal hole and sits into a hexagonal extrusion on t118. does anybody know why and do i stil need friction paper i cant imagine it doing anything.

thanks