I installed a skid plate, that protects the hydraulic filter and the HST fan. There are a few vendors of these, including TractorAttachments, BXpanded and Bro-tek (Canadian, which I have). However, some will work with the MMM, others will not.
The Bro-Tek allows a plate that can be removed, to allow the mid-PTO/shaft to operate, like with a front mounted snowblower, while still covering the filter and fan.