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That looks very familiar... There's a third pulley in mine which allows the drill to go down to really low speeds. The middle pulley is on a sort of offset arm so that it's free to move about when...

I sort of made a similar frame and used epoxy like others have done on here like this:-

94119412

The bridges from one rail to the other is to allow the epoxy to self level.
The Epoxy is Wests...

No Don't buy 100A welder you need more Amp's spare for duty cycle. Biggest problem with cheap Arc welders is low Duty cycle or better put the time you can weld before the it trips out from over...