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Perhaps you could show some of your ongoing and finished projects

Perhaps if you stripped the paint it might reveal something,

many years ago I did a lot of jig-boring building progression dies and getting holes fitted to GOs and NO GOs with boring heads, we used to run the tool on auto-feed up and down several times because of deflection

Has anyone mentioned CamBam, its fairly cheap, and has a good forum, Edmund

Peter, SU carbs are very simple I used to tune 3 on a 1959 Healey 3000 Mk11 and 2 on a Healey sprite, Edmund Alberta,

Iron 16 If you are curious about the Taig Mill and interested in what it is capable of machining you can go to my channel Walter Maisey on youtube I have lots of videos of projects there,

Iron 16, Have you considered a Taig Mill?

Could they be what I know them as, "Jenny Calipers" do a search

Danuzzo. an extra long bed would put the chocolate on the cake, Oops, icing, Edmund

I have a Taig Lathe and Mill, Taig does not have the accessories that Sherline has which means they have to be built if needed, but that is a way of learning for a novice, the lathe is relatively cheap for a starter. and Sherline accessories are fairly expensive, If you want to see the type of...

I have had my 4x6 and 1inch belt sander from when Busy Bee was in Vancouver British Columbia over 20 plus years, have served me well and never let me down, Edmund.........Alberta

She, wouldn't be Jenny Hines by chance, Edmund........Alberta,

I'm pretty sure the Seal is a side valve, and the Sealion is an overhead cam, I am building the Sealion it's about 90% complete, Edmund...........Alberta

K2, I cannot take credit because there was information previous to building my first Fizgig, (this is my 2nd fizgig), that was in 2000, Mick Collins the originator of Fizgig suggested two types of piston, both aluminium, one solid and one hollow, all I did was to use graphite instead, indeed...

I haven't a clue, it is brittle material it seems to be just compressed granules even rubbing the surface of the piston with a piece of paper will erase the surface until I slide it into the cylinder bore that's when it becomes compressed to a hard and slippery fit, The Delrin insert is just a...

K2, I am no expert on graphite material, the piece I had was of unknown identity, hot air engines need low friction and as far as I'm aware very accurate dims are not a must, and any kind of contact of moving parts will reduce power and it will even refuse to run, to machine Graphite I think...

ACHiPo, a few pics of the disassembled piston, I believe contact with any type of oil will turn it into a messy sticky black goo,

Here are a few pictures of my Graphite piston, it might give some clarity in design, of course, if there is the possibility of oil getting on the piston then it will fail completely, the white plug is Delrin and a close fit in the bore and the flat head is self-explanatory...

I haven't been following this thread so I am reaching in from outside the box I am in the process of building Fizgig a hot air engine and for the piston, I am using Graphite would that material work for you? just a thought, Edmund...........Alberta

I can confirm the Tesla story or was within my area of Alberta I can confirm the Tesla story it was not far from me in central Alberta a few weeks ago,