Pullmax adaptor.pdfHi Stu.
Not certain how your P9 tool post is configured, but on the P-21 model, the tool holder can be inserted with the offset inside or outside the throat. Using this ability, I have fabricated a spacer plate to centre the offset tool holder.
Bearing in mind that original accessories for these machines cost an arm and a leg at best, with this method (if possible in your case) you'll have the best of both worlds!
The attached pic illustrates the principle...