Adjustment of difficulty is the easiest and cheapest way to go,
, I used to do that myself. One problem, it gives a false sense of achievement. It makes you think you are doing better than you really are
.
I found out the hard way when riding up a hill local to me that wasn't that steep or long, 9-10% and about 1/2 a mile
. My legs just went nope about half way up
.
Since then I've had the trainer at 100% and adjusted the gearing accordingly. I still may not be able to climb up some of these hills around where I live but at least I know why that is the case.