A rather long standing issue is that of keeping track of the number of turns the guide probe position encoders make. Likely due to access load on the TCS it can loose (accuracy in) the position of the guide probe and consequently in the resulting position of the telescope, and this issue reduces the speed at which the guide probe can be moved. Using a microcomputer keeping direct track of this can alleviate this problem, both allowing for higher speeds of the guide probe without the danger of loosing counting of the turns, and reducing the CPU load on the TCS that no longer needs to keep track of the turns itself.