I think it would be interesting to fabricate a different attachment system for the rake, one that didn't utilize the forks, and provided for full use of the curl function. A crude backhoe of sorts, just not as versatile or maneuverable.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.