This is my first post I'm new to the forum. I'm in early stages of constructing my garden railway. I have a loop inside and a hole thru my basment wall going to the outside Till recently I have two bachmann engines a K27 and a c19. These have performed well on the track laid so far.. in november i bought a accurcraft K28 my favorite NG engine. I got it converted to battery/sound a week or so ago. I've run it and have quickly learned it's very picky about track. after watching it derail etc I realized it has much less flexibility and the flanges are only .070" versus .115" for bachmann. I'm redoing my in the basement loop and when weather warms wlll be working outside. Question? Should I solder the joints after getting them aligned good and tight? Where the track is on wood should I screw the ties/sleepers down. Mostly useing piko/lgb switches. I notice the wheels on the K28 drop slightly at the switch frogs. Any remedy? Any advise would be appreciated. Don't know british name for frog? sorry bout be long winded. boB