I am venting my new blaze king princess stove. With how my ceiling trusses worked out, vs trying to keep my stove as close to wall as possible, I need about a 6” offset of double wall black pipe below ceiling. I see 2 45s give about 4-1/2” inches. Trying to keep things exact. Is there any way to get an inch or two extra without adding a 6 inch piece of pipe?