Abstract: Compact golf club set configurable during game play at player discretion prior to shot play, comprising: Adjustable-length shaft 100 in discrete length positions 165 in telescoping handle 110; adjustable-length shaft 100 including head interchange mechanism 170; Interchangeable head 200, 300, 400 in adjustable-length shaft 100, with fixed loft head options 201, 301, 401; adjustable loft heads 202, 302 incorporating adjustable loft mechanism 500a, 500b, and sole 504 whose geometry 545 keeps adjustable loft heads 202, 302 horizontal on the ground; Interchangeable fixed or adjustable loft head, encompassing: Wood heads 200: 1-wood 210, fairway woods 220, and hybrids; Iron heads 300: 1- to 9-irons 310, 320 and wedges 330; and/or putter head 400.