for all types from VLJ to Falcon 900 through CL604, 160 kt clean was proven OK
Don't know who you spoke to, but a 604/605 at the max weight permitted for landing on 17 (EU-OPS requirements) most certainly cannot do 160 kts clean. The
minimum manoevering speed is 170 and normal recommendation is 180.
At 160 knots we would normally have flap 30, although this is a perfectly acceptable and regularly used gear up configuration.
Maybe you need to speak to some operators who actually know what the AFM says.
OK, I'll grovel now.
Should have done the brief before responding to what was written on the thread. I see it says speed not less than min clean or 160, so no prob with 604 being a bit faster.