Hi,
and thanks for the benevolent replies
About modifying the PST: I think that someone that owns a PST and thinks about upgrading it is well aware of the difficulties and dangers that arise. Plus most of the modified PSTs are built for imaging, at least this is my impression after showing the modification on the ITV (largest star party in europe).
Compare that to a discounters binoculars which is, regarding the sun, much more dangerous. Yes, there is a manual to the binoculars telling you not to do so, but then again, who reads a binoculars manual? AND customers are non-astronomers ...
Don't get me wrong, I don't want to downplay the dangers! This system is surely not meant for excessive visual observations!