Ya, EDO, those screws were annoying. But it prolly took about 10 minutes total with some sand paper and a pair of pliers to hold the screws to sand those suckers down.
As far as the drip tip situation. If you have different size orings to go on them you might have better luck getting them to fit. I had to do some swapping around between my drip tips to get them to fit properly; but the connection for the drip tip does seem a little smaller than it should be.
As far as performance for the price. Once you deal with the quirks already mentioned, it works as you would expect a KFL to perform I suppose. With that said, if you have the extra 25 bucks or so I would prolly stick with the Russian 91%. The crunchy threads of the EHPRO is the deal breaker for me. Also, I totally understand the appeal of the Russian now with the adjustable draw. The EHPRO is like sucking through a straw. It is way too airy for my liking. Hopefully someone with both the original Kayfun Lite and EHPRO can compare the air flow.