Boring and Honing

Great Day, One question you had made mention that it is important to use the torque plate during the honing process. But I just want to make sure, is it mandatory to use the torque plate during the boring and the honing process and not just the honing part.

You may not 'need' to, but if you do the rough bore without the plate, then use the plate for the final honing and it distorts the bore slightly, that means the hone will need to take off varing amounts of material around the bore. This may cause uneven loading on the hone and, possible, a little vibration and irregular removal of the remaining material.

However, I'm not a machinist, so if one of them would care to comment?

Well base on your logic, we can day that it will be best to use the torque plate for the both process.