As a little Threadomancy never hurt anyone and I found this thread very inspiring for building my own Jugula lanistas I will post pictures of some of my variants here. All are from the 1/35 Pegasus and Italeri gladiator sets.
The two most recent conversions were these two Sagittarii, made from Italeri originals. The Italeri box features every model twice, which seems redundant but actually provides a lot of conversion material!