I'm looking at buying M999YSA a 2020 kombi with t/g but owner had extra row of seats put in to use for business clients. I would want to remove them and install a track for one row of seats to slide to original position or back so as to have a table to fit in between. What will be left if seats removed completely? Big holes into the floor? If so how many, how big and what would be the cleanest way of sealing them up? Thanks