We have 2 adult teens and occasionally, we go on trips together. I found a MX 5-seater and was wondering if I could add the 3rd bench later on if needed. Anyone know if I can do this through Tesla or from an after-market products? Also, I was considering the MS but now that the MX is only 5K apart, I may jump to the MX. If you own a 5-seater, why didn't you purchase the MS since you don't need to carry more passengers? I'm still debating between the MS or the MX and have read lots of pros and cons between the two but for most part, people purchased the MX need to haul 6 or more passenger or they have small children and need easy access to the 2nd and 3rd row seats. Want to hear feedback from 5-seater owners.