Easy peasy before tightening the scopes up on mounts slide the scope back or forward all depends on the where the position of the scopes are if they are forward then loosen the mounts which holds the scopes and slide it the opposite direction then tighten them back up job done!
If you find tics on any of your animals and you got nothing to hand use nail varnish remover on it, put it on to a cotton bud and dab it on the tic the tic will release slightly give it a couple of seconds and it picks off very easy!