Seems very close to a QJLS by measurements. Just like pd and olf are very close.
QJLS 176.0 21.2 1.8 1.1 18.0 1.6 5.2 30.75 9.19
fdja 176.0 21.2 1.8 1.1 17.5 1.6 34.75 9.53
Orion LF 175.1 21.1 1.5 1.2 17.4 1.9 5.7 27.25 10.32
PD - 175.1 21.1 1.7 1.2 17.3 1.9 5.7 28.25 11.11
Seems like mischeif to me.
Seems pretty smart to me. The JLS and OLF are two of the best discs ever made.