Felt deep six build

Hi all

Have a Deep Six im planning on building UP... Here is what i have in mind... Please jump in to keep me on the right track,,

KW Gas Cap Kit { For Deep Six Tank }
KW Motor mount Kit
66cc Balanced / Slant Plug Head Motor
SBP Hd shift Kit II { jack shaft Drive }
Shimano Nexus SG-8C31 8-Speed Coaster Brake Internally Geared Hub
Sturmey Archer Dynamo front Hub Brake

Don't really need an 8 speed, but already have it on the bike.. Have not Started to Motorize it yet.. The 8 speed is nice for just Cruising.
I Mt Bike and also ride a Felt Carbon Fiber Tri bike..
Just getting a parts list going... Any one see something i am Missing or don't Need ????

Thanks.... Mike