ATM Re: 25" scope

[Ak55c@aol.com]

Hi all,

Ok, I have been following all the talk about PLOP and mirror cell designs.
Now that it seems that everyone is done arguing I have a question for all:
I have just acquired a second hand Galaxy 25" mirror (2" thick) that I am 
going to build a mount for.  If I build a mirror cell as per Berry-Kriege 
(the 27 point one), does anyone realistically think that  their will be a 
performance difference (over a
PLOP designed cell), that can be detected  with the human eye or photographic
means????  John Hudek (Galaxy optics) says no.  I respectfully question 
whether
this is a case of amateurs getting carried away.  So my question to all is 
should
I stick with the Berry-Kriege design???
Also, as for the secondary size on this scope, of course I, as all, want the 
best of both worlds.  A 4" diagonal has a 16% obstruction and a 3.5" is 14%.
I would prefer to go with the 4" but I do a lot of planetary observing.  Will 
this
2% increase in obstruction really be noticeable in the eyepiece???  The 4" is 
still well below 20% obstruction.

Thank you to all who respond.
Scott