This is a good idea for elimination and peace of mind to clear those major pieces . All the lads recommended advice have been very good , I hope that you will now be well on the way to get a positive solution and outcome to your perplexing issue .I just made an appointment with a racing workshop to check the rim's and discs alignment, just in case. Fingers crossed
PS. I have made some peace with guitarrasa , I have admitted often being annoying and obnoxious .....and that I probably best leave it at that .... cos I'm off for a fun ride today !!