Jimmeand boys- I have the suro 20. Just recieved it last week and its up and running. From the instructions we recieved, it appears you have to cut the humidity pad at two different lengths... one length (approximately 2 inches or 50-55mm) for humidity up to 50%, and another length for humidity over 60% (70-75mm or 2 and 3/4 to 3 inches). 1cm=10mm. Convert cm to inches by multiplying cm by .3937. We had to google it... cuz we stink at math. We folded it length-wise and affixed it under the motor with the provided clips... according to the diagram. The water tube should be positioned to drip onto the pad. We will switch to the larger cut piece of the humidity pad when we need to take our humidity above 60% for lockdown. You should have plenty of humidity pad to cut... there should be extra length. The instructions ARE a little difficult to follow... but I guess we did it right because it has been holding temp and humidity EXACTLY for 4 days now. Hope this helps.