As above really - I have recently bought myself a rather lovely Mk1 Prosport in .177, which had its original vintage Nikko Silver Crown with a 40mm objective fitted - I opted to leave that with the shop, as I have a number of scopes, including a very nice Hawke Varmint SF with a 44mm lens, but even this is a little too high for a perfect cheek weld, as compared to the original Nikko on its very low mounts. I have always used AO or SF scopes, but is there a size of scope where adjusting the parallax is just not needed? Almost feel as if I need to go back and purchase the original Nikko now!