Jacek why all the fear mongering? Not many riggers are going to
enthusiastic about jumping a round reserve, simply because it's round
and there much more comfortable ways to go parachuting these days.
All of these old rigs that are reasonably airworthy are as likely to
work as when they were built.
Yes newer is better, if you have the knowledge or are willing to gain
the knowledge to use a ramair pilot rig. Otherwise there is likely no
significant difference between a round reserve built yesterday and one
built twenty or thirty years ago.