Here's two tubes mounted on a 650 Givi rack. You have to wiggle the lids a little to get them out, ant the lower one barely rubs the chainguard under full suspension compression, but not enough to push the guard into the chain.
2010 Triumph Bonneville T100 56k (mine)
2013 Triumph Bonneville (hers)
1991 Honda Nighthawk 6k
The thing is Bob, it's not that I'm lazy, it's that I just don't care.