Hey Guys. I am new to the forum but been in the business for 15 years. This is a great tool for all to learn and adapt . Now Im kinda embarased to say I am still applying the chemical with hand pump sprayers ,,but have upgraded to a flojet this season . First question , has anyone tried the M-16 Thruster nozzle from envirospec ? Second Q- Has anyone figured out how to get red clay stains out of brick mortar and bedford stone . Ive tried muratic acid with no luck . Thanks