how critical is form thickness? What would you do?

[mountaineer2]

I am just starting a air hose type form.I purchased some 3/4" cabinet grade plywood that is about .25" of an inch shy of 1-1/2" inches doubled up. I found a piece of 5mm plywood bought it and it makes my total about a 1/8" over. If guys would please give me your opionin. I dont have a drum sander .I do have a  6" x 48" that  made into a side sander.I was interested to see if that was enough to worry about.
What would you guys do?

Thanks

[T Folts]

If you glue it up with screws then remove them you should be able to find someone with a planer, thats what I did.