Modded PST - Success at last

Very windy with high cloud, but I just had to test out the PST black body on the cut-back Vixen 80.Even under these conditions the image came cleanly into focus and the tuning ring brought out the surface granulation and "hot spots" Not much in the way of proms but everything looks 100%.For anyone who still has some doubts about the PST mod; honestly you will not regret making the change; the images are far, far, superior than you get with the 40mm basic system.At a stopped down aperture of 60mm, an 1 1/4" #25 Red + UV-IR filter screwed into the german PST nosepiece works well with no obvious heat build up. A cheap way of starting the mod????Should have believed the calculations we did almost 6 months ago: the optimum position of the PST etalon is very close to the calculated 200mm inside focus. As I've found, other positions will give an image but certainly not as tight and clear as when it's positioned correctly.Using the PST black body is the fastest way of verifying the position. If it focusses, then you're pretty close!!I'll get some confirmation images with the DMK as soon as conditions improve.Also, I found the website for the Lumicon Prom Filter; states that the filter is a narrow band 1.5A, and MUST be used above f20 ( up to f60), with an ERF. I'll put a 45mm aperture mask on the Vixen and re-try.