The Squid
Spaced-out CephaloMOD
Hey sistah! Not sure if I follow you. There is already a long vent cut into your wood? If so yeah that will work just the light leak as I said. If you use one of the four inch holes with duct tubing then that will block your light AND pull air in. Hope we're on the right page.
I also wouldn't worry about those other additives you have. LW is good for starting as it has no nutes and won't burn your baby. Then you can transplant to a pot with a mix of LW and OF. 50/50 would be ok or you could go 50LW/25OF/25perlite. You need some perlite in there. I don't use so I don't know if it has any but it's good stuff. You're always gonna add nutes later so the ratio of OF can be lower. You never wanna give them too much. Rock on.
I also wouldn't worry about those other additives you have. LW is good for starting as it has no nutes and won't burn your baby. Then you can transplant to a pot with a mix of LW and OF. 50/50 would be ok or you could go 50LW/25OF/25perlite. You need some perlite in there. I don't use so I don't know if it has any but it's good stuff. You're always gonna add nutes later so the ratio of OF can be lower. You never wanna give them too much. Rock on.