2020 Domane Seat Mast… Begging for Water in Body?

Whereas I really like my 2020 Domane SL7 Disc, I am unable to assist however suppose that the seat publish design is simply begging for water and filth to get into the body. The binder bolt to tighten the seat publish mast is a big slot at the back of the seat tube which is a primo-place for overspray from the rear tire to go:

I feel it might be good if Trek devised a rubber “plug” for this gap to assist maintain water out, much like the plug on the chain keep for the DuoTrap sensor:

Are you able to consider a strategy to seal that gap, however nonetheless permit entry to it within the occasion that I must take away or regulate my seat publish?

I thought of simply placing some type of tape over the entire, however clearly that will imply a brand new piece of tape every time I adjusted or eliminated the seat publish, to not point out the build-up of tape residue.