User blog comment:A, Mori/The Forged Fates/@comment-16075172-20160308144325/@comment-16075172-20160308183718

I was more going to suggest that he made the jetpack thing to his own proportions and all, which is why he'd be unable to provide them to his friends because they wouldn't fit; otherwise it could be a problem that it often gets damaged during the gang's adventures and so he more focuses on fixing his own jetpack rather than making more for other people (this stems more of a personal preference to not sacrifice aerial mobility for him but I also feel like your idea makes more sense and also it's up to you so)