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<DIV>Hi Neil</DIV>
<DIV> </DIV>
<DIV>I have only had problems with the centre part with the spiral
groove cracking and on a really bad one the cracks extending to the outer
ring with the 0-100 calibrations. All the rest of the parts have been
fine. </DIV>
<DIV> </DIV>
<DIV>An NCR router or milling machine would be another alternative for
manufacture?</DIV>
<DIV> </DIV>
<DIV><FONT lang=0 size=2 face=Arial FAMILY="SANSSERIF"
PTSIZE="10">73<BR></FONT><FONT lang=0 color=#0000ff size=4 face=Arial
FAMILY="SANSSERIF" PTSIZE="14"><I><BR>Bob</FONT><FONT lang=0 color=#000000
size=2 face=Arial FAMILY="SANSSERIF" PTSIZE="10"></I><BR>Bob F Burns<BR>C Eng,
FIET, MSE<BR>Amateur Radio Callsign: G3OOU<BR>Registered RSGB
Instructor<BR>G-QRP Member No: 6907; Zone: 14, QRA: IO91WH; WAB:
TQ25<BR>Secretary of Crystal Palace Radio & Electronics Club: <A
href="http://www.g3oou.co.uk/">www.g3oou.co.uk</A><BR>Technical web site: <A
href="http://www.qsl.net/g3oou">www.qsl.net/g3oou</A><BR>Follow G3OOU as
@BobFBurns on Twitter </FONT><FONT lang=0 color=#0000ff size=2
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href="http://twitter.com/BobFBurns">Http://twitter.com/BobFBurns</A></FONT></DIV></FONT></BODY></HTML>