fietsbob

Engineering has unfortunately made derailleur bikes more consumer friendly
by eliminating the riders ability to do the things that would simplify your situation.

friction shifting, 'thumbshifters' and such as the left bar end lever,
on current Shimano indexed bar end shifters,
let you move the lever just a little bit to solve the chain drag ..
typically done after each gear change..
but that is deemed to narrow the mass consumer potential to old guys like me..

I have to admit , the rapid push button like click between 1 shift and another
is an engineering marvel .. when new they snap right into place ,
right out of the box , from just the work done in China,
by all those people putting the parts on new bikes,
and wrapping and packing them for shipping to your local bike shop.

surprisingly pretty adequately adjusted , the Big Box Stores leave things be,
and just put the bars on and the seat and the pedals and put it on the sales floor.