The website shows the HD’s big brother. the TD. They are very similar, except the HD has an integral exhaust/intake, that only has one gasket that attaches to the side of the powerhead.
Great tip. I tried this out the other day on my TN-28, except
I screwed in a 5/16″ tap with a T handle. The tube started spinning
right away and pulled out easy. I got lucky on that one.
Please note that the AD shown on the Poche website for new leather primer seals and instructions is about 15 years old. I had to raise the price to $10.00 per set abut 5 years ago. Difficult to find proper leather to make more. I sent emails to David Poche to update the info but no response.