I just would like to share my experience with the Ravin Jack Plate, so others can benefit before purchasing it.
I have a Tenpoint Nitro XRT which has an original Weaver Rail from Tenpoint (no modifications here).
I decided to buy the Ravin Jack Plate due to its capabilities of extending your shots up to 200 yards (as claimed somewhere in their website/sellers online, etc..). I am not sure though if it says 200 MoA or 250 MoA of elevation adjustment, it might have some contradictions in different sites I had a look before.
Well, I looked a lot through YouTube videos, Forums, websites, but there is not a lot of information on these Jack Plates, to be honest almost none (does it suit a Tenpoint Nitro XRT or other brands? how do you mount in different rails? dimensions? weight, etc...), so I decided to buy anyway and figure out a way how to fit it in case it did not fit my Crossbow rail, the design looks pretty slick, the adjustment on a horizontal wheel looks better and less clunky in my opinion, and the extended range when removing the lever from the wheel made me choose this one instead of the HHA Optimiser.
Once again, in my opinion it does not make much sense to use an HHA optimiser to shoot out to 100 yards in my case, considering my scope has cross hairs up to 80 yards, for some people it might make more sense if they are using a red dot for example. For target shooting, I wanted the capability to shoot up to 200 yards (we are not allowed to hunt where I live anyway).
I put together a mosaic of pictures and notes here, for easy of explanation, but summarising you cannot fit the Jackplate straight to the Nitro XRT rail, you have to use an adapter, I believe someone here used a vice to squeeze his jack plate to fit on a Tenpoint Stealth NXT (I think he might not have realised Tenpoint uses Weaver 20mm and the Ravin Jack Plate seems to be for Picatinny rail system 21mm, please see picture attached).
I still have to get some low height scope mount to replace my current ones, because my scope is obscenely high on my crossbow. I will possibly put another update here once I try and shoot with it for a few dozen shots.
By the way, pay attention that my Ravin Jack Plate does not look with the one on Ravin Website, neither Wyvern Website which I bought it from (is it an old version? new version? is it fake, is it chinese? no idea....)
Please guys leave some comments about your experiences with these pates on Tenpoint crossbows, I would like to hear if more people got similar Jack Plates like mine.