There are quite a few (not me, not yet) members who have purchased from Gabriel; in most regards his items are good to excellent quality, although absolutely accurate they're not; but, from all posts I've seen regarding Gabe, he's striving to improve on things and gladly welcomes input from people (TDH members specifically) in order to make his product line more accurate...
Gabe is a member of this forum; I'm not sure which name he goes by now, but you could search here for "britt59" and get whatever info you need...