A picture of the mount would be greatly appreciated, thanks! I've been researching this for about a month, the spindle mount seems like the last hurdle before purchase, but I'm not sure how easy it's going to be to fix.
You say you're going to compromise on the motor, does that mean stick with the 400w or only upgrade to something like 800w?
I can't figure out the message system on this site, if you are able to then send me a message, I'll send you my email and you can send me the mount picture if that's still okay with you. Or just post the mount picture on the forum if you're okay with that. Either way would be a massive help :)

Many thanks,
Tom