Lathe Screw Cutting a large Stub ACME thread : Home machine shop projects No.2

Today in the Hobby Machine Shop I screw cut a large Stub ACME thread on a tube however, this large job on my small lathe presents some problems.
#homemachineshop #screwcutting

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Stub ACME thread details from Little Machine Shop :
https://littlemachineshop.com/images/gallery/instructions/Stub_Acme_Thread_Data_Sheets%20Rev%20A.pdf

Stub ACME thread calculator :
https://play.google.com/store/apps/details?id=com.cinszani.acmestubthread&hl=en_US

Home machine shop equipment :
Lathe, Deckel Fp1 milling machine, horizontal milling machine, Elliot shaping machine, DIY converted cnc milling machine, Surface grinder, Clarkson tool and cutter grinder, drilling machine, oxy propane torch, arc welder.