My 4 yr old Noid phal's 1st bloom

[NeoOrchid]

Hello:

After 4 long years of patience and true love, my rescue Noid phal just bloomed. The opened bloom is small, approx. 3 inches wide.

I use rain water and feed weeakly with Schultz orchid food and she is potted in moss. The plant itself is fairly large for such small blooms; leaves are approx. 6 inches long and there are 8 leaves. Root system is robust.

My question is: Is it typical for an orchid to have small flowers at first bloom? What kinds of things could I do to encourage larger and more flowers? There are only two on a rather spindly spike.

Please see picture for flower.

Thanx!
Neo