You look great :) Like others said your stirrups are probably a little too short, but I shouldn't really say anything mine are considered "too long" by "American standrads" (I learned to ride in Russia). A trainer here told me that if I am still comfortable and secure in the saddle, and not interfiering with the horse, that I should be alright, she also said that she watched the world sj championships and I rode just like the Swedish girls, lol. So, if you are comfortable & secure & not intefiering with your horse, then don't worry TOO much about it.
Also, have you thought about an automatic release? Personally I am not a fan of the crest release, personal opinion, I was taught to jump with an automatic release. You look like a strong enough rider to use the automatic rellease.
Hope this helps :)