Yes, a career can be made or lost on one good or bad switch of employers, and zeddb and I chose a stinker (I did try and warn him by pm). It has taken me five years to get back on track, with a command on a very popular type, (not that obsolete preserve of pensioners flying for beer and hookers). If you're well placed, then age is not a problem ... Get sidetracked onto a bad type with career gaps, and it can be a major problem).