Thanks for your help Looks like I'll go with the pros. Yeah in regards to amps/volts, that's very hard to do, as the motors are really 3s with caution, any higher and it's going to be instant smoke! Brushless is a pain in crawlers and especially for the rig I'm building as the axles pretty much only take 400 size motors. And as of now no one makes a sensored 400 size brushless motor, however there are plans on the table, but that's about it. But I know exactly where your coming from and am trying to follow that principle in my Hyper 7. And just to clarify it's not some rubbish redcat/hsp thing that it only takes small motors

Thanks!
Kieren