Yea I'll work with the company regarding the issue, but I think I'm going back to stock. Unfortunately, my stock slave cylinder fell apart at the boot and pieces went everywhere/are missing. I ordered a new one (not Sirimoto), but the vendor seems to be taking their sweet time...I'd call whoever you bought the aftermarket master/slave from. This is your very first defense, maybe you installed wrong, but it's likely there's a issue on their end.
Personally, I won't touch my master/slave, even for the CDV. I've worked in industrial maintenance for 15 years now. Once you touch a hydraulic system, you end up with leaks. I'll wait for a leak, and go from there on upgrades worth while (I don't see any worth it besides brake upgrades, or CDV).
This goes with engine oil too, I fought turbo drain (not under pressure) leaks. Anything not perfect, oil is thinner than water, and will leak.
If you take a picture of your leak point, it'd be much more helpful. Top off fluid, bleed if needed. Then degrease everything. When clean and dry, have someone slowly push clutch in, while you watch master/slave while your ready to take a picture. I suggest doing this paragraph before contacting supplier, it helps to say "XXX is wrong on the XXXX that you sent me, see pictures"