User defined types,refnums,and program autoupdating

Hello all the Masters,
   I am working now on a large program.And tried to do the next thing: to put  controls and indicators at the cluster,
make it "strict type definition",and pass a reference to this cluster to the sub vi's.The main point is,that the sub vi's update
the values of this cluster too.Here I come to the point : I wanted that if would be easy to add/remove controls to/from the cluster.
   The solution that I "wired" is attached.It uses  .xml file for indication,if the datatype was updated,and if yes,promts user to choose
which variable he wants to update.
  I would like to know your opinion about this "trick".
 Thanks,
Michael .
LV 8.2 at Windows & Linux
Attachments:
update_averaging_index.zip ‏49 KB

Sorry about been not clear: no indicators,just controls at cluster.
The main goal was to do the whole program easy to make changes,such as changing datatypes.Now,the vi's that posted performs a check,
if there were a change at the datatype,if yes,the vi promts the programmer what variables he wants to pass now to be updated and saves the selection.
      I am shure that I am not the first one who thinked about it,just wanted to hear opnion of people who more experienced than me.
  Thanks for reply.
Message Edited by mishklyar on 01-14-2008 03:10 PM
LV 8.2 at Windows & Linux

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