Just looking at the cases I never expected them to be waterproof so it's no big deal to me.
I pack in a big plastic bag first, my bride packs in individual large zip lock bags so she can squeeze out any air first and get as much in as she can.
I was going to try a chunk of sponge rubber under the handle to stop the water pooling up ?
I do have a plan in my head to make some waterproof covers but weather it annoys me enough ever get around to it is the question.
Sticking stuff to plastic is hard to do properly especially in the Aussie heat so adding extra seals and keeping them in place could be tuff.
I recently purchased some strips of rubber and I plan on building some lips inside my bags and top box so things don't stick out the sides when I'm trying to close things up, if it works out I will post it here for you to have a look at.
Some of the 19 rides in my shed
2014 V2, Snoopy
2009 Wee, Pumbaa the pig
WR450F, The Blue Postie Bike
YZ250N smoker with rego, Stinky.
Yamaha MT09 (FZ09), The Scud missile.
Club Lead not Club Med.
He with the most toys wins.
Out of my depth in a puddle.
Live life on the edge you will see more that way.
Ridding a motorcycle keeps things in balance.
At the end of each trail and at the end of each day history is made.