You really should. Especially on E2, you need to take the speculation out of the equation.
I'd personally be worried about your proposed Letro protocol crashing your E2. I believe it's effective rate on inhibiting aromatase activity is at/around 98%, whereas a compound like Anastrozole is closer to 80%. Yeah, you don't want your E2 jumping up, but don't crash yourself either, as a healthy level of estradiol is needed for men just the same. Here's a sticky about E2 management in our HRT forum
http://forums.steroid.com/showthread...ou-should-know . Well worth reading just to get some more knowledge on the subject.
Good advise above ^^ on the caber dosage. It's also a compound that needs to be given proper respect.
Good luck on getting it all sorted out.