Few questions

so this is going to be my first SS because I refuse to spend $500 on a FRT, and the FRS is out of stock every time. I am looking at a SSAE-X pre cut from DNT and the D2 SS kit, anyone have this set up? what do you recommend that I do to get it running as smooth as possible? Is the installation any different than a regular SS install? I have a DDM4, bone stock besides an EXPS3-0. Last question, anyone have the SS kit for the AKM? How hard/easy of an install is it, and would it fit into a Romanian kit AKM? I assume it will, and it should be no issue, I just want a little bit of assurance before I buy one for the AKM. Also for the guys that have a SS for the AKM and were able to make it three position, how did you do it? both of my Romanian AKM’s have three position notches and the receiver is all original.