Thats attraction Tony, i'm always chopping, changing and scope switching !
Cant do it with the "heavy stuff" but air guns are fun, always something to adjust, change, try, ponder and generally tinker with !
If you're going in from the Newark side, Darren, go through North Hykeham. Once you go past the left turn for Doddington, it's approximately a mile and you'll see the shop on the right near KwikFit and next door to a Tesco Express. So about a mile and a half before the centre.