Hello I want to do a electric conversion to my baja 5b but don't want to spend 1000 dollars on the castle one. I would like to know if there's maybe a different cheaper conversion I don't know about or maybe a different motor esc combo that will fit the castle conversion but does not cost as much.But I would still like it to go 40 to 45 mph as advertised with the baja 5b ss. Any advise would be helpful.