I'm looking to upgrade the focuser on my Orion SkyQuest XT10 DOB. It current has a Orion 2" Crayford-Style Telescope Single Speed Focuser and I want to change it to a dual speed. The issues is all the focusers, that I have searched for the base won't fit the hole pattern and cover the hole for the focuser tube of my OTA. Do anyone know of a way to upgrade it or modify the current focuser on it. I have attached a link to the current focuser on my OTA. Thanks in advance for you help.