You wont go wrong with these Jeremy , I am pretty sure JJJinettie uses them , she is the one that put me on to them .
Good eyepiecs's .They feel nice in the hand , solid like TV eyepieces so I did do a quick 1/2 hour comparo using my Zeiss Telementor f/11.4 and SKY90 f/5.5 with the 15mm GSO SV and my 19mm TV Panoptic , thats when I realised these are very good eyepieces in both scopes . In a long f/l Zeiss and the short f/l Tak the 15mm held its own against my 19mm Pan , impressive for $39 .
Brian.