I present to you my start on a Kramer four wheel steer loader. I will try to update this post with my progress over the next few weeks, which is something that i do not normally do.
I only had portal hubs which gave a good reduction, but the pivot point was going to cause steering issues. I have created my own axles with reduction at the pivot point. If these present problems, then I have planetary hubs in the post. Everything is a work in progress and there may be tweeks along the way.
The plan: 2 x XL motors for drive, servo for steering, XL for lift, M motor for bucket, onboard compressor for 3rd service/quick hitch. Possible auto valve for 3rd service. Xerion wheels will be used for the rubber. Comments welcome.