Had mine 11 months (1st used on the 20th May 2008)...it's been back to Gardiners for a service within 5 months (great customer service) ...and recently I have had to cut:
1x 8inch section from the top of section 2 and re-instate the clamp.
1x 8 inch section from the top of section 3 and re-instate the clamp.
It has already had numerous 15mm sections cut and shut from sections 2 and 3 over the past couple of months owing to 'spinning'.
...reason...so worn both on the inside and outside walls from wear..the carbon was so worn you could push it through with your finger tip...and the crack line followed the weave of the carbon.
So I am now ordering a new pole...in less than a year..ok it is light and flexible and yes it does earn me money...but carbon is strong...but it wears...also remember I have to pay around 80 to 90 pound to have it sent to me here in Holland...so another expense.
Do not get me wrong I am not having a pop..this pole has earned me some very good money...but I do not work 5 days a week every week...infact I work 6,5 weeks out of every 8, had nearly a month off work over the Christmas period and a load of time off due to the severe freezing weather we had here...many -5 to -7 days...so this pole that was from the first batch...has not exactly been used for 11 months...I could work out how many hours it has actually been used but I wont as I do not think that it would be good for my head...

Now I love working with the SL-X...it has been light and strong...but and here it is...I do now have to find the money for another pole...yes I could buy a couple of sections but I have to admit that I now do not trust the pole that much...as I think it is worn is other places too....and when these sections go....you'll hear a crack and you'll feel the break take place.
So now to help out I am using the extention for the SL-X which assist's but it does add extra weight.
So my advice to anyone with this pole....split the pole down each working day and hose the inside and outsides out...to remove all grit/dirt...as I think this must be having an effect on the pole..also be aware the the pole hose does attract grit/dirt and this does travel through the pole deposting the grit....
I have to be honest I have had a bit of a cavalier approach to this pole...it has been used and put straight back in the van on fridays and then out for the 1st job monday ...and every now and then it was washed through it was never trodden on or abused but pole hygiene was not really observed that much...so there is a freebie lesson...

Cheers
Dave.
ps..The SL brushes are without doubt the best I have used....I have the range and have found them all to be good at what they do....