Newbie here. I'm trying to design a layout in HO and am presently limited to about 5' x 8'. Most of the "small" layouts I've seen seem to relyheavily on 18" radius curves and #4 turnouts. Yet, I read here and other sources that #4 and even #6 turnbouts should be avoided. I don't plan on anything longer than perhaps 60' rolling stock and will probably go diesel although I haven't narrowed it further. I'd probably go with Atlas code 83 and use 22" radius where possible but 18" seems inevitable in places. Mostly turnouts more gentle than #4 seem to really limit flexibility. I'd appreciate any opinions.