My co-worker wants to sell me her late husbands' Tiltall-Leitz Tripod, it's a #4602 w/ retractable spikes and a pan-type head.
I was wondering if I should buy it off of her and sell the heavy Slik Pro 700DX I just got or should I give it back? I do like the spikes (the Slik doesn't have them).
I went to a camera shop today and found that a Manfrotto quick-release plate will screw onto the thread just fine, but it isn't 100% secure (the nut underneath the plate is meant to come undone unless i superglued it or something

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I know nothing of these tripods and I was wondering if the heads can come off and maybe I can put a more modern head on them.
Here's a pic from someone's auction on ebay. It looks like this except there's not quick release plate (that's an add on). It has a circular plate instead w/ some padding that's losing its adhesive
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Here's another view of a newer Tiltall, but the design is basically the same as the one I got:
So what do you guys think? Should I buy it and add stuff onto it? I don't even know if it can support the hefty K10 and a telephoto and I can't seem to find any load capacity or any info at all about this company and the tripod.

But I love the build quality and it's lighter than the Slik