[jw2170]

G'day Fibber, welcome to the forum.

How thick is the template?

Easiest way would be to trim the guide bushing so that it protudes only 1/4".

I had to do that with one of my guide bushing sets.

 

[jw2170]

OK, so we find that you were not using the correct guide bushing!!!
Not you fault...

I would trim back the one you have with a hack saw, and tidy up with high grit sandpaper.

I did see a Youtube video showing how, but cannot find it....

 

[jw2170]

Yes, @bfblack , that would have been my solution, but I just suggested the easiest solution for the OP..

I was lucky on one of my sets, to have the metal guys at my Mens Shed cut all the barrels back to just under 1/4" so they will work with 1/4" templates.

I have a generic (PC style) and a Router Workshop set, both in brass....