I`m making a point from as someone who actually does this work, I don`t see how that can be construed as a bloody lecture! I stand by my comment, using double-sided adhesive tape and sticky pads is bodging, I don`t care what you might read to the contrary on U tube! The Seiko modding fraternity might be happy doing this but that doesn`t make it right. What happens when the watch needs servicing? Where does the sticky goo from the tape end up? I`ll tell you, it has to be carefully removed before the mainplate goes into cleaning solution and that's a pain in the arse to do!
Matt has pointed out exactly the right item to use, but even they can cause the dial to sit fractionally higher which is not desirable, causing a slight misalignment of the movement and crown. Sometimes its a problem, sometimes it isn`t, it all depends on the dial and the top of the mainplate. Provided the repairer is taking full account of this all should be well, there is a device available that allows a small flat countersink to be made in the dial to accommodate the additional thickness of the flat base of the foot, I don`t have one but I can get the same effect using a modified drillbit and a bit of ingenuity. When the movement has a date function the job becomes harder, the date wheel has to be able to move smoothly with sufficient clearance and they usually run very close to the dial feet.
One of the hardest parts is to get the foot in exactly the correct position, the only reliable way is to mount the feet onto the mainplate using the dial fixing screws then affix the dial to the feet taking care to centralise it correctly. Near enough won't do, it has to be absolutely correct. I`ve used a brand of superglue gel that gives around 12 secs working time and done them one at a time, this worked a treat. Whilst not as good as an original unbroken foot this constitutes an acceptable repair and if I find a dial that's had this treatment I`m OK with it.
As I said, this is a fiddly laborious procedure. Often the dial feet have to be trimmed and slimmed down a little, working on this scale isn`t easy and it all takes time. This work is best undertaken when the watch is being serviced and fully stripped down, there are a few good reasons why.
Unfortunately a lot of old watches have been worked on my monkeys in the past carrying out dubious work, clumsiness and lack of care cause dial feet to break.