Got these to convert my iDSD from 2.5 to 4.4, it works fantastically well, but they are a bit big, so I have to put them at a certain angle so as not to rub against the volume knob. Do make sure you have clearance!
Make sure you set them correctly. I didn’t push my pentacon all the way in and it shorted my dac. Nothing broken but there was a loud audible buzz from my dac letting me know I didn’t do it right.