Looking At A Hubble 18"/20"

I'm not in the market for one but I thought I would post a link to an interferometry report on one:
http://translate.googleusercontent.com/translate_c?depth=1&hl=en&prev=search&rurl=translate.google.com&sl=de&u=http://r2.astro-foren.com/index.php/de/11-beitraege/03-newton-systeme-und-verwandte-fragen/255-c061-hubble-optics-18-newton-made-in-china&usg=ALkJrhicor8XPQP_4yTEEQFcrkZXleoCag

Bottom line:
"From the perspective of value for money we have for about 2.500 US dollars a good mirror in front of us, which is slightly lighter than
the usual 23 kg heavy 20-inch model."
Now on the 20"
http://translate.googleusercontent.com/translate_c?depth=1&hl=en&prev=search&rurl=translate.google.com&sl=de&u=http://r2.astro-foren.com/index.php/de/11-beitraege/03-newton-systeme-und-verwandte-fragen/647-c061a-hubble-optics-20-inch-d-507-f-2145-r-4290&usg=ALkJrhgK-w1YlOvH4v3xeG39oaYRcI3fuQ
Looks like the secondary was a problem...
Wish we had more test reports like these...