Most PENs are capable of 1/320sec sync if the corresponding contacts are taped or if using 3rd party (e.g. Nikon) flashes. Is it possible to hack the FL-LM1 to do the 1/320sec sync at least in manual mode? I am asking, because I'd like to fire a strobe as optical slave in an underwater photo setup. Unfortunately, the UW housing doesn't allow for any 3rd party strobes, that I could use as master.