I completed the Bonelle T&CG. I posted pictures of it on the Quorn owners site. I would post a picture here but my life is too short to invest time trying to learn, understand and follow the recent instructions on this site. The little smiley faces say this thread is worthless without picts but I just do not get it.
During this build I ran into the same discussion about imperial/metric dimensions and thread sizes. I do not understand this either. If I need a particular system of measurement I press the button on my digital caliper. I do not understand the need to make totally new drawings. I write the required dimension next to the offending one. I use a thread conversion chart printed off the internet. Should I not have the called out thread I use the next closest one from the chart and make the notation on the drawing. I am not an engineer so I do not understand the many, subtle nuances of screw thread design. There are many things I do not understand.
I live in Shreveport, LA, where we benefit from the constant high humidity of the Gulf Coast. One of which is it is a perfect environment for iron oxide. My machine sits on the top of my bench rusting away. I used a black oxide coating on every part I could and used chrome bars and brass. But the items not protected or changed rust. I try to avoid wiping with oil because of the grinding dust. I long ago gave up the idea of keeping metal parts in this environment bright. Dust is another problem. My area is air-conditioned but the outside dust still gets in and settles upon everything. Being an old man and living alone, I just let it settle. A cover would help but not with the rust. I prefer to see the enemy. Your machine would fit right in. Were I closer I would try to talk you out of it. I have found many uses for the grinder and have had occasion to make more accessorizes and modifications.
Am reading Thomas's books and just read about the superior wedging effect of the split cotters. The Bonelle uses all split cotters.
I made mine from scrap bar stock from an hydraulic repair shop. The shop lets me take whatever I find in their rubbish can. The only expense was for the motor, belt, wiring.
The Bonelle is much better than the Quorn for making modifications as you are not limited by the castings.