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It isn't impossible to get close enough to perfect permanent collimation. But it would be a bit silly due to the expense of producing the precision locating parts.
The silliest way would be to make everything perfect without collimation. This requires great accuracy and repeatability in all components. The less silly way is to design a method of assembly that is very repeatable and do a single collimation that will be permanent.
Possible yes, practical no.
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