Thanks Jay and others for the feedback and answering my silly questions as I teacher once told me well I should say taught me, ask a silly question remain a fool for a minute remain silent and remain a fool for a lifetime.

I am looking at something simple and following pretty closely a plan from one of my timber framing books.

Furrel chisels a 1 1/2' maybe a 2" or metric equivalence and maybe a corner chisel seems to be a good starter kit.

Interesting you are using metric for layout, I see a lot of the layout looks especially mortice templates borneman square or the one from timber HQ etc are imperial, as are most of the plans I have come across online and in books. Builders squares are still 2" and 1 1/2" even the metric ones on the market in oz. There is a little bit of me says get a metric one machined out of a solid block of aluminium kinda like the timber HQ model but all a single piece you could machine a relief fillet at the L plates too just like a builders square as at the L. I designed a grain mill for home brewing mashmaster.com that is all metric except for the keyed drive shaft it is imperial 1/2 couplings are easier than 12mm and get this the mounting bolds are UNC. Even in oz people just assume the drive shaft is 1/2" but the mounting blocks catch people out.

But I guess there is not a big difference between 1 1/2" and 40mm. Actually I read your comment over on the forestry forum (I assume it was you same user handle)



I will have to have a think about metric, converting plans. I really think it would make working better.

As for measuring errors I know americans complaint about burning an inch, lol better than burning 100mm ahaha