Strange about the Alpha bushes you have as I find the 3 sets I have (1 used 2 new) all a good fit. Hadn't noticed any difference to the fit on the Mistral.All bushes are a sliding fit, but that doesn't mean they are not a loose or tight fit, I have 3 sets of bushes for the alpha and they are loose to the extent of being useless. I wondered if the bushes for this new pen would be as good a fit as the bushes for the Mistral and the Tempest, I suppose time will tell.
Peter
Only time I had issues with bushes really is the Rizheng kits now and then
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