HiFi Kit Building- have you ever built any hifi gear?

The informed opinion on the Subject is easy to obtain. Explain to the insurer that there is an intention for certain electrical goods to have a particular provenance and what that provenance is. If the insurer is given an accurate description, their reply to what this means to an Insurance Policy is the only informed opinion each individual will need, as I am sure each policy is unique to a particular residence, as location, and quoted values are not typical.

It is much more important that the individual who has seen the DIY options and finds them attractive has an improved understanding of all the risks. The usual disclaimer that the build is done at one's own risk and there is a risk of electric shock. Works very well when a DIY build is being considered as a pre-warning. For many, it is enough reading to be a deterrent to take the build on as a self-built endeavour. There is also what the post-build means, and post-build risk is very rarely discussed. 

Keeping the information whole is what really matters. 

Note: Insurance, as a business, has two methods of being a lucrative source of income. Of which one is receiving payment but not receiving claims? The other is investigating claims and discovering reasons that void a policy and not to make a claim payment.

As an individual fully signed up to the methods proposed to produce electrical goods used for audio, and also having been loaned a reasonable amount of audio items produced DIY produced by individuals. I fail to see how my sharing information is a dire warning. 

I built 4 Heahkits.  Best were a small integrated around 1974 and then a power amp that was supposed to match with a preamp they offered.  I did not care for the preamp but was advised tha amp was compatible with the Hafler Preamp I built.

Always best to take a broader view when subjects are insular, as this one is looking to be.

https://www.stereonet.com/forums/topic/570920-rebuilt-dodgy-diy-projects/

There are other reports also able to be read, which I feel confident are accurate in content. 

As a university freshman at UW-Madison WI, I purchased a Dynaco SCA-80Q kit and a pair of The Smaller Advent Loudspeakers from The Happy Medium. I soldered the kit together at my tiny dorm room desk, Of course, I made a mistake, and the amp did not power up. A trip back to the store, and few days with their tech solved that, and my roommate’s pair of Advents and a Dual 1215 table with a Shure M91 were added to the loudest, proudest system on our floor. We had created the center of gravity! I still have that Dynaco, dead and sitting on my desk, the base for a Linn Kan speaker. 

Yes, I built a Hafler DH110 Preamp and a DH220 power amp in the 80s. They worked great. Had them till I bought some used Bryston amps around 2000.