Thanks guys. That means a new SG-60 to renew my MX. :-)
I just looked in the "operating manual". The SG/SE 60 are marked "especially compatible" for the FA*24/2 & F*300/4.5. The SC69 is marked "compatible" with the 24 and "split-image and microprism spots darken, or focus accuracy deteriorates" for the 300.
I'd suggest an enablement with the "real thing": an LX ;-)
cheers, caveman