By the way, I figured this out. Fuck the custom 404 page. I like using htaccess more anyways:
RewriteRule ^ergo$ /site/models/ei [NC,L]
RewriteRule ^modeler$ /site/hobby [NC,L]
RewriteRule ^modeller /site/hobby [NC,L]
RewriteRule ^inhouse$ /site/test [NC,L]
RewriteRule ^in-house$ /site/test [NC,L]
RewriteRule ^freeinhouse$ /site/test [NC,L]
RewriteRule ^fite$ /site/test [NC,L]
RewriteRule ^inhouse$ /site/test [NC,L]
RewriteRule ^tips$ /site/models/st [NC,L]
RewriteRule ^repair$ /site/repair [NC,L]
Using the rewrite, it retains the same URL they put in which is an added bonus.