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I have a Glatter and a Tak scope and have seen results that differ with each piece of equipment.
The Glatter collimator is less accurate than the Tak scope in my opinion.
With the Tak scope you have to be very particular and then need to do a star test to do final collimation on the secondary.
Collimation of RC's is very finicky and can be very frustrating. I am still not 100% satisfied that I have collimation correct on my scope but it is very close from what I can see. Persistence with the Tak scope is my recommendation. Watch Ken Crawfords video too. Perhaps check that the secondary is centre spotted correctly too.
BTW, threaded junctions are the way to go with getting collimation totally correct.
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