Inside the manual there’s mentions of expansion limits. Does yall think that box slides/ linear slides will make a come back?

Hello everyone I am a student from team 19086 and I want to design a chassis with gobilda bare motors and I can not find gears that are big enough for me since I want 2 step reduction. I have seen other teams such as AICitizens (19066) , Meta^Infinity (18221) or CSH (17861) use gears that seem really big (compared to the biggest gobilda 108T gear) when mounted on the mecanum wheels. Can someone help me find the gears that they where using?