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I managed to achieve focus with my neximage and the GSO 10" dob without any issues so I expect you should be ok with the LPI. I have changed focuser since I got the LPI and have also shortened my OTA for DSLR work so can't check. The best way to check is to find something really big and bright like the moon so it is easy to get the scope in the right position and then keep it there with one hand moving the scope while you focus with the other. It is possible you won't be able to rack the focuser in far enough then you will need to consider what you can change to help. Options include:
Make the 2"-1 1/4" adaptor as low profile as you can - I machined the flange on mine down to get the DSI to focus with a filter wheel.
Move the primary mirror forward (longer colimation bolts)
Reduce the length of the optical tube - last resort.
You can also use a 2x barlow to solve the inward focus problem however this will double your magnification and make the object transit your FOV in half the time so not so good for a Dob mount.
Peter
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