I agree with your opinion that it is worth doing slam try. 3A and minor K is enough.
Btw, what is the difference between direct 5H and 5H via 4S?
I know it is a matter of agreement but how do you feel?
Roland, pd may not double with your example hand and if he has a stronger hand he would have doubled instead of 2C.
With this hand, direct 2C is acceptable but X as first action seems to construct the bidding well.