Unfortunately, this part is not very fit. It takes a lot of strength to get the diffuser on both sides on the respective "locking noses". I made it just as I have this self easily trimmed to the diffuser. But then: Once on top, it is very difficult runterzukriegen again - too much "choke" you do not want too, because the then goes to the pivoting mechanism of the flash head. So: The relatively high price would be okay if it was at least true to size and thus to make good - but so ...? Of course, he met, once it is set up, its purpose (and good), but you want him even without damaging the Blitzgrät, lose weight now and then.