Does anyone have experience with a slider that has the optional spraying unit for cutting light metals?? I'm planning to buy a slider at the end of this year, and am trying to decide if I should get a K700S with that option, as I do an odd array of one-off fabrication, and the ability to cut aluminum sheet could be helpful.? My main hesitation is whether the sprayer is really only useful to enable a saw for consistent cutting of aluminum, but not so helpful if one is regularly wanting to switch between wood and aluminum.? If it takes me hours to switch materials due to the need for cleaning things up, I won't bother with the sprayer.