I have my dad's L225 while I am having some radiator work done on my 8n. I usually use my 8n with my landscape rake. My question is, is there some adjustment on the L225 to keep the landscape rake down and pressure on it. I am used to my 8n that has draft control and position control switch that wont let the rake raise up when I am raking limbs,debris etc.Would that be the knob under the seat that has a arrow and a "F" and "S" lock? Should I have that on lock if I want to keep constant pressure on the rake and not to raise up and over the particular debris I am trying to move???Thank you very much in advance for any help you may offer.