Don't be a cake! I've been fitting mine to Festo 27mm hose ends for years. OK it's not ideal, but neither is it problematic.
Take it in hand! Show it who's boss. Don't molly-coddle it.
You WILL lose your tiny O-ring seal from the mid-end of the sander's duct. Inevitable, really. Otherwise it's a firm fit requiring a firm hand. That's all.
If in doubt there's always the Metabo/Bosch 19mm/5m hose with 25/35mm push fit ends, which mates well to a Festo 36mm hose. Trouble is the acoustics of the setup at full suction sounds like the exhaust of a gas turbine & 80,000revs! Turn down the suction to tame the scream.