...there are four spawns, Using Thingnums 1313, 1314, 1315 and 1316.
1313: Spawns Crawlas, Buzzes and Jetty-Syns (All varieties)
1314: Spawns Crawlas, Buzzes and Jetty-Syns (All varieties) and Eggmobile 1
1315: Spawns Jetty-Syn Bombers and Gunners
1316: Spawns Red and Blue Crawlas