I have also built the 1:72 Italeri Bell 47, twice, in civil liveries. I must say that I was actually quite pleased with the tailboom: it doesn't look too bulky to me.
I have also built the Revell 1:35 Bell 47 and I consider the tailboom of that kit looking much uglier and bulkier than the Italeri's in 1:72!
I agree with Seventysecond: etch brass doesn't look good on round tubular constructions like this. I have also built the Special Hobby 1:72 Robinson R22, which also has a carload of brass parts, in this case on the landing gear. I ended up not using the brass etch parts and replaced them with EverGreen plastic tubes.
Whatever you decide: good luck!
Gertjan