I service dozens of bikes a month and in most cases the drain tube is partially full to full of oil, very little condensate from the engine, and on the VTXs there is often alot of oil in the bottom of the filter housing. I noted on some other posts that I thought (JMO) that your design having the tubes directly in front of the throttle body intake would suck all that oil into the engine, and as far as the pair goes, the vacuum created by that would in fact suck the reed valve closed negating the pair . The stock configuration (and the other manufacturers I have seen ) has the tubes off to the top and bottom or side of the intake, so there would be very little suction.This illustration shows exactly how the emission system is designed to work. We designed our Air Cleaner Adapter to function as stock. As you can see the PAIR Valve gets its air from inside the intake tract, just like our unit. You can also see that the top end breather exits the blow-by gas into the intake tract, just like our unit.
The stock set up has a drain in the bottom of the Air Cleaner housing. This drain is there to remove moisture from riding in the rain, condensation, or water from washing your bike. Your custom Air Cleaner will most likely not have this drain so care should be taken when riding in the rain & when washing your bike.
If you are not interested in emissions & protecting our environment, our adapter can be plugged where the hoses attach & small external filters can be added. However if your bike blows oil, it will come out these filters so be careful where you mount them. There could also be an issue when you go to be emission tested every year.