hmm i just dont like the idea of any dollies of this type at all, home made or not.
i only will use the floor jacks and jackstands
i just cant trust anything else. and rather not take any more risk than possible. i already gotta work under vehicles on a twin post lift every day that i have no idea how well is secured to the concrete and one is not braced at all and actually moves when we lift a vehicle up
so yeah..... thats enough risk for me.... i dont want any more and ive taken wayyyyyy too many crazy risks over the years that ive been lucky and not gotten seriously hurt with.... somehow.... i dont know how...