Quoted from pinballinreno:I use my harbor freight drill guide all the time.
But, Its a but funky, you have to pull the metal securing points all the way up to not destroy your work.
Its plastic, so its not good for heavy or precision work. But for playfields its just fine.
It doesnt have a positive center to lock it into place. You have to check it with a square and then over tighten the knobs so it doesnt change. It has to be adjusted properly to get it to move smoothly, I oiled the rods with super-lube oil
So, its funky.
It works pretty good once you get to know it.
But, what do you expect for $20 ? Definitely not for heavy or commercial use LOL. But for casual use, its ok.
Over-all, It works for me. I especially like it for forstner bits and spade bits when drilling cabinet holes. A drill block wont help with those types of bits.
A drill block is a much more stable approach. Or like vid said, just a block of hardwood drilled out.
I have a stack of hardwood flooring samples glued together with the bottom one a cushioned type to not scratch the playfield.
I drill out whatever size I need with my drill press.
Its a non-scratch drill block that I can lightly calmp down!
I was checking out the Harbor Freight, Wolfcraft, and Milescraft drill guides today. The HF just looked too cheaply made, and plastic like you said. The MC was cast metal and looked a little sturdier than the WC, plus it was a little cheaper, so that's what I went with. I would have made a few wood blocks and saved the money as Vid suggested, but unfortunately no access to a drill press.
Those hardwood flooring sample blocks from Home Depot are handy, aren't they? I cut them to size and clamp them on top of the playfield to flatten down raised inserts.
Was looking at that too but it doesn't cover enough bit sizes that I need.
Doesn't mean I can't try to do better than the factory.