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The Bintel/GSO dobs and the LB are virtually identical. I have a GSO 12" Dob which uses the same mirror as the LB and it is brilliant.
I did replace the collimation bits with Bobs Knobs on both the primary and secondary and put their springs in also. Hold collimation like a beaut and very easy to adjust.
IMHO the GSO alt bearings are fantastic. Did use a LB once and would prefer the GSO one, but others may disagree. If portablilty is important definitely go the LB as the 12" solid tude is a big beast!
Malcolm
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