Awesome!
So, to train them most effectively (staying away from isolation work on machines) would I need to stick in certain rep-ranges on certain exercises? Are they primarily fast- or slow-twitch fibers that respond best to certain intensities? For instance, my calves are responding very well to my new calf training program (which I made from suggestions from Built): 2 straight legged movements @ 5x5 at a faster tempo (Gastrocnemious is primarily fast twitch), followed by 4x12 on seated calf raise at a slower tempo, pausing for 2 seconds on the bottom of the each eccentric (soleus is primarily slow-twitch).
I'm asking because I want to develop my inner thighs more, but am not sure if they will just develop along with the rest of my legs (like forearms to upper arms). I train on a program I wrote of two 6 week programs culminating in week 12's max efforts. Each program consists of different exercises, and each week I train at a different intensity (e.g. 70% @ 3x8/1.5 min rest; 80% @ 5x5/2-2.5 min rest). So, to adjust rep ranges for one particular muscle wouldn't be ideal, but I'd be willing to mix things up to get the desired growth in the area.