Construction of Trisys 300 and 270 mids are somehow softer than PC 600 and Graphite Tour 600 (NOT necessarily reflected in RA measurement), and are easily deformed by improper stringing. (yep, happened to me
Watch out when stringing with this frame:
1.
Do NOT string in one-piece, or bottom-up crosses, or else risk turning into "flat-top" carrot shape -- top-down crosses please.
2. 6-point mounting machine is your friend. Avoid 2 point mounting ones.