I bought 2 chokes for my 12 gauge Invector+ last year. 665 and 675, I believe. They patterned well, and the 665 was the one that made the cut for my TSS barrel (I'm shooting an over/under). I tested several chokes and loads, and the Sumtoy was great. However, at the end of the season when I went to clean the gun I couldn't get the choke out of the barrel. I thought it had seized, which I couldn't understand because I used lube every time I changed chokes during patterning. I didn't put many rounds through it either. I had to get vice grips to twist it out. After cleaning, I tried to put back in, and it wouldn't go. My other chokes still fit fine, so I'm assuming the tube swelled. Not complaining, because I didn't seek any kind of resolution or explanation because I understand things happen. Was a little disappointed though. I will say that his willingness to answer questions and help me choose the right constriction to try was very generous. I'll keep trying the 675, and hopefully it will make it in the rotation one day,
