I have a DX-GE5 Sea and Sea that I want to go from 1 strobe to 2. I have the Sea and Sea YS-02 strobe. I have a dealer telling me I need to purchase 2 YS-01's. Now im not against doing this but it would be far cheaper for me to just buy 1 YS-02. Hoping to get some straight scoop from someone not trying to sell me something. Is there a legitimate reason to buy 2 YS-02's instead of just buying the 1 YS-01? thanks for any advise you chose to offer.