ive had the 40x comp for about 6 months now and i am close to being at one with it. Firstly providing you can undo the locking ring you can reparralx it to 10yds which also has the advantage of improving the distinction between ranges at the 50 and 55yd range.
Ive had a very small side wheel fitted as the gaps are huge between the ranges so a big wheel is not required. The scope takes some learning and rocking it back and forth is NOT the technique. like others i have found that moving slowly but consistently from near to far and focusing on something like a reset string rather than faceplate will yield the best and most consistent results.
ive found the scope to be solid, temperature stable and very reliable. on the downside i have the fine cross hair with target dot and this can get lost in dark target / light conditions. i will end up changing the ret for sure.
When I was 5 I wanted to be like George Best
At 10 I wanted to be Nigel Mansell
At 40 I wanted to be like Tiger Woods
At 50 I want to be like Gilly
Just shows how life can kick you in the nads