I want a luggage rack with platform and side hard-bag racks on every bike I own;it's a pain to be on a ride and go into a store or yard sale,etc. and have no way to take your purchase with you.
I like the Connecticut Cycle Accessories/CCA 3-piece luggage racks as they're made from good,strong USA steel and 4-point frame mounted;simple to remove the 12" x12" top platform with 4 bolts on each side;they were made with good chrome also.
The problem of getting under the seat with the special designed rack which is meant for the 'F' can be worked around..
The CCA rack top removes with

sturdy bolts and then remove the left side rack support with it's two large bolts.
The bike could have an AGM battery which has had the connectors properly maintained and tightened then remove the rack only for air filter maintenance when needed.
Here's a picture of my little CB125S 'basic transportation'/gas-saver I ride which I had brought to a welder and modified the original CCA top rack using the hard-case lower racks from an air-head BMW R75/5 so I can carry more luggage down low where it handles better.
The lowers also have extra braces from the parts from the original BMW rack which help strengthen the entire rack.
I would like to have the complete rack system powder coated bright silver with clear but for now it works very well.
I carried a 60lb. engine on that top rack and the strong rack(4-point frame mounted for strength)handled it fine.