[44net] Right Way to Add IPIP Connections to BGP-Announced Network

With is the correct AMPRNet way to connect a BGP-announced AMPR netblock to the IPs that live behind IPIP tunnels? Should I just use one of my IPs in the /24 for the IPIP tunnel on my side, connect to 44.0.0.1/169.228.66.251, and use ampr-ripd? Or do I need a second subnet as in a "pure" IPIP setup and route between those networks myself? I'm not finding any good docs on the topic, but if I'm missing something please point me in the right direction. My understanding is that AMPR networks behind IPIP-based gateways can't necessarily get out to the wider Internet but rely on IPIP tunnels to different networks they want to reach via the rip44 service. We're working on setting up a larger Allstar-based repeater network and once we get it finally going, I want networks elsewhere in AMPRNet to be able to connect if they desire. Thanks. Jason