Leo Spychalla sells a conversion kit to modify a Yellow Spit kit in ot a bubble top spit. Check out SpychallaAircraft here on RCU.
I am building a 12 foot Spit Mk.IXB

Re; What Chad said in post #7 from IMP/Baskin plans now on RCSB. I like the BAskin plans. The spit plans do show the gear instllation while not all the Baskin plans do, as Chad says. It looks like BAskins later plans all have the gear installation shown.
Jeff