Hi
Iv'e had an Unger 5 section as you have for 5 years. I also have a further 2 extensions that fit between 4 and 5 and have never used them ever. Hardly ever use the 5 section either. Its too heavy and bendy. I only use the 4 sections on some apartments we do with Juilet Balconies every 6 weeks. The flexiness of them works to our advantage, but only with this job.
But I always have them in the van, just incase I accidently damage my SLX.
Spruce