I served a while successfully using a forehand grip but eventually I realized I needed to switch to continental to put more spin on it and to start unleashing the full potential of the body. The forehand/frying pan grip did me allright and feels more 'natural' to begin with, but I know it's not the most effective. So my coach and I have been reworking my serve from scratch starting with the pure pronation motion using continental grip, taking away my legs and torso and just having me kneel down and practice pronating. Also I'm doing the normal pronation/serve drills like throwing balls, going up to a fence and swinging the edge of the racquet toward it then pronating at the last minute, and all this stuff. The fence drill is fine. My main problem when I'm working on the continental grip serving/pronation is the follow through post-ball contact serving real balls in a non-drill setting. It feels like I'm stressing my elbow/arm/wrist too much and my racquet isn't naturally coming through the ball in the most logical/biomechanically efficient manner... For example, when I throw a ball as far as I can from the baseline as in drills, my arm naturally and flowingly comes through down to my side and then to the left and it feels loose and healthy, but when I attempt to serve with this new grip and replicate this throwing/pronating motion that isn't the case and it's like I'm putting too much stress on my wrist and arm and elbow as the racquet comes downward/sideways after the ball is hit. Any specific advice for the follow through of the serve, or just general tips for what I've talked about? I don't really have anything specific other than my follow through not feeling right and feeling like I'm going to hurt my arm. Although when I look at Sampras and other heavily pronating servers their follow through DOES seem relatively extreme and unnatural to me in terms of how their elbow/arm bends so much to the right... are my muscles simply not used to this since I've been serving with a forehand grip with hardly any pronation for so long? Any drills I can do to help with the follow through? The fence drill where you swing up to the fence and rotate at the last moment to put the strings toward it is good for the pure act of pronation alone BUT it doesn't deal with this main concern I'm having which is totally post-contact! I mean, this looks like it would hurt... but it doesn't? Do I just need to condition myself to be able to withstand this? How does the wrist take this?