indentAs you will be able to tell from the fact that it is version "4h", there have been a number of previous plans!  In fact, the numerals stand for new "concepts" (the first three were quite different), whereas the letter stands for the variant as the concept was modified.  Generally speaking, this came came about as gradually more prototypical information became available but some changes were for aesthetic or practical reasons.   (Again, for more info click here. But later, when I've had time to add it!)

indentThis layout is based on the Bernina Railway's "Pontrasina" station but, owing mainly to lack of space, I have had to add a rock-face directly behind it and restrict the width.  (In fact Plan 4g was 3 inches narrower and did not have the third loop at the front nor the extra sidings but both became essential for operation owing to the inability to rearrange the makeup of trains off-scene at St. Moritz.  This is because St Moritz is represented by two storage loops under the layout.) Since there is a ravine between the station and the rock face - working on the theory that if you have not got width to create the impression you want you can use depth instead - and also because the customer wanted a viaduct over a ravine - a very good reason to put one in, of course - I am likely to rename the station "Pontravina".
indentI know, it means nothing to anyone who does not speak English but then my customer is English and wishes to take it to exhibitions in the UK.  Sounds reasonable to me!  The station is set at a height of 12" from the bottom of the baseboard as this gives ample room for good clearance above the DC return loops, ample depth for a ravine and space to fit a control panel vertically along the front.  (That in the current photos is merely for test purposes; a proper one will appear later, once I have designed and built it.  (It is now, March 2010, designed and construction is in hand.)  That depends upon how I lay it all out and that depends upon the controls necessary for the signalling, which I am working on at present.  Still, nearly there...)

Entering tunnel "D" at a height now of 21", we come to a joint in the baseboards (two off baseboards; arranged vertically one atop the other!), then take a reversal of direction to emerge immediately above but 6" higher and beneath a gallery.  Curving back round to the front, through a rock cutting (a kind of reverse Montobello Curve), we cross a tumbling stream before diving into tunnel "E" to change direction again and emerge above tunnel "C".  Still climbing we pass through a short tunnel "F" and then swing up into a shortened version of Alp Grüm set at a height of 41". 
indentThose of you familiar with "AG" will realise that this is approached from the "wrong" direction but it was the only way to fit it in!  Some would complain that the Triebwagen will be facing the wrong way but, as we are using return loops to turn trains round, they will still be the correct way round half of the time!  Climbing once more through a gallery we enter the final tunnel "G" and continue off scene.  Beyond this the line drops sharply until it is below the rear corner of AG station and then drops further under the approach.   As it approaches the stream it will be low enough to build a pair of reversing loops to hold trains before they reappear in turn, later, at tunnel-mouth "G".  Between the lower and upper return loops a train will therefore do some 4 laps of the baseboard and climb over 2½ feet!  And fitting that lot into the confines of an 8 foot by 4 foot 9 inch baseboard took a bit of planning; hence the "version h"!