3/8" Round on 1/2" ply

[djtecthreat]

Getting to where I have to start finishing my 8x Otop12's. I need to do a 3/8" round so the Penn corners will fit correctly, how do I do a 3/8" round on the front area and the access panel area when the bearing sits lower than the board? I realize I can brad nail a piece of scrap in there, but my concern is that it may flex or move causing the round to be uneven.

Any tips?

[WB]

Any tips?

Clamp a straight edge to the top and bottom of the box to guide the router along.

Like this.

And this.

[Harley]

Any tips?

Clamp a straight edge to the top and bottom of the box to guide the router along.

That straight edged looks a bit flimsy!

[WB]

That straight edged looks a bit flimsy!

LOL.

I tried not to lean into it too much and bend it.

[djtecthreat]

Any tips?

Clamp a straight edge to the top and bottom of the box to guide the router along.

Like this.

And this.

Genius!! Here I am thinking I have to cut a piece to fit in side to openings of the box with angles and all (dumb). I have a couple chunks of aluminum stock that I use as guide boards and straight edges, these will work perfect.


Thanks!!

[WB]

Any tips?

Clamp a straight edge to the top and bottom of the box to guide the router along.

Like this.

And this.

Genius!!

Aw, shucks, it was nothing, (blushing) Thank you, ... but actually, I may have seen that idea used somewhere.

I have a couple chunks of aluminum stock that I use as guide boards and straight edges, these will work perfect.

Just be careful, that'll be even more flimsier than my slab o steel.

[djtecthreat]

Just be careful, that'll be even more flimsier than my slab o steel.

Haha, nah this is some 2"x2" stock that I used to build a go-cart a couple years ago, it's solid stuff! Although I could use some of that steel stock you have there!