ROP is a pretty cool deal. I wear mines at night and it helps me a lot in keeping me pumped. I'm still working up to wearing the anti turtle sleeve all night, but not quite there just yet. Zinc rod you can clean with soap and water, the copper rod clean it with vinegar.
Thats good bro! Looking at the picture, I can see room for you to start playing with the tension bars to increase the pull. Get used to it first, and go as you feel comfortable with.
That might press into your skin a bit more since there would be less surface area. Maybe make it more prone to cracking or breaking even.
I have an X4 Labs extender, and I also use the bigger base which IMO is much more comfortable then the normal base.