Agent,Mr Baumer was kind enough to make me a couple of his rocket sights.
I've used them with other rockets also,his box sights work well with the british rockets on the mossie and tiffie.
TBH,I havent used them much with the ingame HVAR's but I dont see why they wouldnt work just aswell with them.
If you try them out in the TA and take advantage of the LCG you'll quickly learn which angles and speeds work best.
Try his PB1 runs in the TA and you'll see at around 325 or so the tank sits nicely in the box,just remember to put the tank in the proper box for the firing order.