Where do you get bike models for farseer and warlocks????
Other than that, i am not sure if the warp spiders are worth it. Very expensive and with only MEQ save might be better off with guardian jetbikes or a large mob o' guardians.
I made some simple conversions using jetbikes and Dire Avenger bits. You can do what you want, for helms/cloaks, etc.. But in my mind, wearing a cloak on a bike is just asking for trouble.
I used DA Exarch direswords as witchblades and the "Power weapon" spears as singing spears. They look great! Once I have them painted (along with the other 70% of my huge armory that isn't painted yet) I will post some pics!
DAMN YOU, DICE GODS!