As one added bonus, at some point in the future when gSender displays the toolchange comments in the toast message, you’ll also get more information about the tool (tool number, description and comment field instead of just Txx):
Pretty sure @DiscoJon was using mine. Feel free to dig into it. I haven’t had much need to change it in a while. The last changes I made were all related to machine configurations and simulations, but don’t affect the gcode for Shapeoko.