If you have an problem reading the labeling on the picture above, here is the parts list starting at the upper portion of the picture and going clockwise:

2 ea  20 1/2" pvc
1 ea of 1/2" threaded plug with a 5/16" hole drilled in the center to accept the rod of the pump
2 ea 13 1/4" pvc
2 ea 12 3/4" pvc
2 ea 9 1/2" pvc
2 ea 3 5/8" pvc
2 ea 2" pvc
2 ea 3/4" slipXslip tees with a 1" hole drilled in it
4 ea 3/4"X1/2" bushing
2 ea hose clamps to secure the 'legs' of the pump to the 8" section of 1" pvc

The framework is pretty simple but it should be dry fitted first then glue each part together.  Remember to lay out the entire lower frame first.  The 8" of 1" pvc works like a sleeve over the 1/2" and allows the pump to move with the prop.  Inside the 1/2" threaded plug with a 5/16" hole drilled in it is a 5/16" nut to attach the pump rod to the plug which is screwed into the 3/4"X1/2" slip to thread tee.  This tee is over the 13 1/4"  section of 1/2" to make a swivel point for the prop to sit up.  There is no need for a restricter spring on the prop as the frame work will prevent the prop from extending past the end of the pump's capacity.  However, sometimes a spring is needed from the bottom of the pump to the head of the prop to make sure the prop returns to its incline position after the air is no longer applied.