I've ordered a 2" filter thread extension tube for my 2" diagonal so that it could serve as a mini-drawtube which effectively extends the focus travel range of my transformed Ranger which has the original focuser removed and replaced with a short focus travel NGF-CM. Such a combination works with all my existing eyepieces from a 2" Pentax SMC XL to a 13mm Nagler with 2x or even 5x.
Previously my Ranger was used solely for solar imaging and since I used it with a reducer, so I really cared more on the in-travel. Now, it's my only telescope so I wanted to make it more versatile.
Now it's also capable for visual work!