while my new clutch is grabbing great, I'm noticing a sorta sluggish feeling when I push the clutch in at speed occasionally...when I start the car, the clutch feels fine, real smooth when I depress it, but some times on the uptake it feels kinda squishy. I don't think it's the actual clutch, I was thinking maybe that the fluid might be low, have bubbles etc.....since that had to replace the clutch assembly, they might have not filled it completely. I believe our clutch and brake fluid tap the same reservoir correct? Any thoughts on this? Should I bleed out the system and replace the fluid? Where is the drain plug?