Has anyone successfully done an ER-Hop install with the PDI chamber? Looking at the pictures, there seems to be little room for the ER-Hop window, which I'm okay with because it's still larger than the stock window, but what worries the most is the little space available for an EM-Nub. Has...

With all the different hop up styles coming out, what are all of the different kinds? and what are the differences in all of them? Some names I have heard of are: r-hop, J-Hop, IR-Hop, ER-Hop, and T-Hop. I have no info on them other than that though.(any help is appreciated)