And so you should be... 1370mm FL !!
I had wondered how a long-FL folded-optics scope of one kind or another would do on this mount. Guess I have my answer.
I zoomed my browser up to 500% on your #033252 image, and the stars in the center of field still looked round to me. :-)
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras: Nikon D5300, Altair GPCAM2-IMX224C
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer: Thinkpad x230, Win7Pro/64