Reinforcing the power of the course computer by any means sounds to be a pretty reasonable idea, especially when one is expecting remarkebly higher loads, I guess.
Just to add a little bit to the history
conversion: we did some 2,000 nm since I exchanged the helmdrive by the hyraulic pump (2 ys. ago, without any further modifications), some of the miles under comparatively heavy conditions. No problems so far.
But our "baby trawler" is small (25 ft), motor
powered (no sails), and navigating through relatively fair seas (Adriatic). Anyhow, meanwhile we have "forgotten" that the setup once was different, which seems to be a comforting experience.