I understand that there are scale outline errors with the PST Panther- ie, the tail shape is incorrect for one of the - versions of the Panther. If you plan to compete with the model I suggest that you verify the outline to your set of documentation. If competing in AMA Fun Scale, this may not be necessary, only for AMA Sport Scale where the outline is considered for the Static Score. It may be worth checking on this.
Terry H. may chime in here as he has bullt and flown the PST Panther-but don't know if he has competed with it though.
I had one of the early "splash offs" of the Ziroli version but the fuselage had a serious warp in it. Ended up trashing it and selling the retracts/struts/wheels to someone building the balsa version from plans.
Rgds,
Art ARRO