Way OT Saddle sanding jig (musical instrument related)

[Mariner]

Way off topic but do any of the musicians here have one of those roller jigs for reducing saddle height?
Was going to buy one but they are a bit spendy for a once in a lifetime use.
I need to intonate a uke as string action is too high. Could take it to the luthiers
but it would be an interesting exercise to do it myself then take it to the luthiers if it goes belly up.
Will pay postage each way plus a beer token if required.