I did it last year. Ordered a RV-10 tail cone, slo build fues, and quick build wings.
Would have done much better leaving the money in the market. The largest price increase was in the crating charges but I picked the tailcone up in a box and the rest uncrated at the factory. I forget the exact saving, but it was about 2 percent. Delivery of the fues and wing was in about four weeks. Great service!