[Gilbear]

RM - I use similar guides for my circular saw, jig saw and router as I don't have a table saw - this isn't just an "it ain't fancy but it works" thing - it works pretty flippin well!! That edge on the mdf will be right at the saws or bit's cut line (at least untill you change blades or bits)!) - NOTE: make sure your blade is truley at 90 to the base plate or as you change cut depth it will drift away from the guide edge! If you want to make the "Deluxe" model, put some self-adhesive sand paper on the bottom side so they're less likely to slip. Pretty fancy!!

 

[Gilbear]

Hey, BJ!
I think the beauty of addding a base plate to a circular is, not only have you trued-up the edge with the blade, but if you make it zero clearnce by plunging through it the first time, you have a ready gauge to tell you where either edge of the blade is gonna cut as well as providing chipping protection, particularly on plywood - the thing with the guide like RM and I use is there's no additional measuring - mark your cut line on the material, line the mdf edge of the guide right on it and cut away! Once again, many ways to skin a cat - glad I'm not a cat!

 

[Gilbear]

Man, BJ -
If we keep this up there's not gonna be any cats left to skin and then whose gonna keep all those rampant dogs under control?!!
Either ways cool in my book and I see what you're saying - you deduct the base plate offset from your measurement - I just prefer having to do a little less math - I've been challenged that way since kindergarten (in fact I barely got out alive)!!

 

[Gilbear]

Back at ya!!