this is the second kit still fits the same wagon but has more in the kit 
can fit BACHMANN gwr bogie well wagon
barrel should go up and down
you are buying an non built and non painted 3d printed model kit 
allow 2 weeks to print 
will need to be sanded and filed and test fitting will be required for best results 
Bachman well wagon is not included model kit only 

video of this on my layout 
 https://www.youtube.com/watch?v=CyYqgEMz5z4&feature=youtu.be