Siebo said "it may whistle but you'll get massive clouds." Nice enough guy, but they basically cant control which ones whistle or not.
That's all true, it's probably almost impossible to predict how a bamboo will whistle, even when all bamboos look and perform the same, tiny differences can change their sound significantly. What they could do is to test these bamboos and discard the loud ones.
The Evo bamboo holes are smaller so whistling is more likely was my take away.
This is not true, all bamboos should have exactly same sized holes, from early originals, to late EVOs. Any smaller or bigger ones would be manufactoring errors. They only changed posistion withing the bamboo during early EVOs, but that only had little effect on the "heating per draw speed curve", not much whistling.
I've had one original Cloud and 3 EVOs (each one with different hole positions) and they all whistled a little differently, and not a single one whistled loudly. And the original Cloud had the smallest hole of them all.
I'm sorry for your whistling bamboo, I think the loud ones are random and rare, so a bamboo replacement could very likely fix that.
And you don't need to go back to original Cloud to fix that because the whistling is basically the same there, some originals also whistle loudly.
Theres no bamboo that doesn't whistle, all of them do, just differently with peaks at dirrefent draw speeds and some of them are loud.
Did you try putting on the heat shield and having the velcro muffle the sound? In my case even if it wasn't that loud in the first place, the velcro made it almost silent beyond my expectations.
Why they don't sell extra bamboos for self install for evos is beyond me.. it's easy to do and should be made easy to get replacement bamboos for issues like this and for when breakage occurs.
I'd love that, had my bamboo broken once... However I think the bamboo replacement is not really fool-proof enough for them to trust all cutomers in doing that. I remeber there was one time when a lot of bamboos were breaking and they found it was because someone was tightening the heater too much.