Interesting. I haven’t seen or heard of a leak like you described. I’ve dived with YS-D1s for 11 years now. Mine have been quite reliable, but I blew out the flash tubes on each one once and had them rebuilt by Pacific Housing Repair. But after many thousands of flashes, the tubes will blow out on any strobe. I also had one battery compartment flood over the years, but just cleaned it out, put a new cap on, and kept going. Devon at Pacific Housing Repair is an authorized S&S repair center. If finally decided to get new strobes. After a lot of research, I bought YS-D3s based on reviews and my experience with YS-D1s.