just had the same issues. put the bike upside down and squirted wd40 down the frame and left it for nearly 2 weeks. then used a heat gun on the frame and stuck part a few times to create heat cycles. eventually the part moved, then it was relatively simple to get them out.
have a look on google earth to get some ideas for routes. the canary islands are extremely well mapped from satellite. we are going to tenerife for 3 weeks in december and do some rides up mount teide: hopefully the weather will be great.
just had the same issues. put the bike upside down and squirted wd40 down the frame and left it for nearly 2 weeks. then used a heat gun on the frame and stuck part a few times to create heat cycles. eventually the part moved, then it was relatively simple to get them out.