programmed drum parts goes wrong when change tempo(reaper)

so when i track my song ideas i made first drum track for a song so there will be lot of those drum parts mostly one drumpart for guitar riff so my problem is i have bad habit that i change tempo too many times and when i do that
let say i change tempo faster then becouse that tempo change those drum parts left too short and then i have to move them right positions by hand
so is there trick to keep them stretch along when i change tempo it would be golden tip if that is possible so anyone else got this kind of problem?
 
I dont really know what you mean.. but if you're recording some ideas and want to try different tempos to see which one fits better do this:

File > Project Settings > Project Settings > Timebase for items~ change to Beats (position, lenght, rate)