You mean one like this?
https://www.bintel.com.au/product/sk...v=322b26af01d5
I have a 10" one at home and it behaves well with everything from a little 10mm Plossl to my 30mm Nagler "Hand grenade" clone Explore Scientific EP so unless it is a really long way out I would not be too concerned. As Raymo said, in these it also helps keep the geartrain in tension.