I'm building a saw for my dad. A 181se but I'm turning it into a 288. He gave me the 52mm top end from the 181 for a oem 288 top end I had. He insisted i use the base gasket. I'm wondering could I get away with reusing the old one? Or should I use a thin coat of motoseal with it? When I build my 288 I won't be using the gasket. Picture is on the complete 181 & then with the 54mm top end almost ready to bolt up