Problem 1: Whats up with the sequencer? Why will it not give me more than 9 sec delay? The instructions says "adjustable from 4-13 sec"
A mail to Horst Lenerz cleared it up:
"You certainly have one of the newer transmitters with a higher pulse repetition time, which causes a much shorter maximum delay time.
At the time the sequencer was developed, 20 Milliseconds have been usual. Today they are 14mSec and shorter."
I also got a good offer on an update to fix the problem and extend the max delay to 40 seconds. Again excellent service.
Problem 2: What is wrong with the retract?
Removing an electric retract from the model is easy, and I soon noticed my problem: The threads on the screw were worn at the place of most resistance. More testing out of the model revealed more of the same I noticed with 4.8 V- the T-rod was pulled out of 90 degrees to the screw.
My answer to this: I need longer threads through the T-rod to prevent the pinching. So I found some 8mm steel rod and made a new T-rod on my mini-lathe. Finally useful!
Tests were promising, but I decided to go one step further and made another T-bar from 12mm brass rod.