One hole is a tad different than playing sets. "Adjustments" can come a mite quicker. I ain't much on for changing horses in the middle of a race. I'm not a one hole player. I was never one much for taking weight either. I played players better than me and slowly moved up the ladder. The times I played champions when I was young I played hard, took my lumps and improved my game. If I am ahead in a game and my opponent starts whinning to change horses,I have always had a standard reply "Win it back the same way you lost it." Never, never, never give up control of that aspect of a match. If there is a change to be, you make it on your time, on your terms. Never let someone else set the pace or change it.
Renegotiation is a common practice for those who can get someone to agree. However if a game is truely out of hand the fellow on the losing end is likely to ask for adjustment. I don't necessarily blame him either. Setting weight is an art form, often painted by swindlers.
The outcomes of playing road players is often determined by who negotiates the best. It can be fastenating to watch the jousting back and forth.