Some of you know I designed a mulch on demand deck several years ago. Anyways, this particular design of mine I culled in field testing. This happened BEFORE I worked out all of the mechanical linkages. I was grateful that I found out the deck was such a compromise on both ends before investing all the time and effort into the linkages and stuff. But I've been messing with this concept again for some time now, and I have arrived back at the same point a second time. Testing is going better this time though. The issue is that I am in that stage again... and it's not "on demand" yet. I've been working on this part of the system trying to devise what to do. Today I did a little testing in mulch mode and found that my design still generates enough discharge force to cause me some issues. The issue is..... the part of the system that closes off the discharge opening... the main plate... I fabricated it out heavy 1/8" steel.... and formed it from a sheet roughly 10" x 16". So 10" x 16" and 1/8" thick. Without the system completed, I'm getting enough discharge force to open this heavy plate. I am rather surprised to say the least! Even with the blade setup that causes the least issue, it still opens it up. It opens far enough to discharge straight up in the air and straight backwards. I was laughing HARD! *************************************** So as I finalize things for the on-demand mechanisms.... What do you guys think I should do???????? My design is not vented with holes like you see on OCDC's and stuff. It's vented a different way, which I 'THINK' is ample. but maybe not. Should I..... 1) Scrap the whole design at the chute in favor of an OCDC style cover with holes? 2) Should I try re-working my ventilation design to allow more air escape? 3) Should I stay with what I have and design something additional to mechanically force it to stay closed? If you were looking at such a mower on a showroom floor, what would you want to see if you were considering the mower?